This is a USB data blocker. It is made of aluminum alloy material, durable to use. Physically removed data prevent any kinds of data transfer or sync so that you can charge your device safely with it in public places. Data are physically removed from the USB port, cannot transfer data with this adapter. The USB data interceptor supports charging up to 12V/3A, so the interceptor will not slow down the charging speed, and can increase the charging speed in some cases. It is suitable for phone, tablet, MP3, and etc. Suitable for hotel, airport, cafe, office, and etc. Product Description: The Smart Stop Sync Adapter prevents accidental data exchange when your device is plugged into someone else's computer or public charging station. A USB data blocker does this by blocking the data prongs on any USB cable and allowing only power to pass through. This will reduce the chances of stealing your data or installing malware on your mobile device. note: Product may vary in colour depending on the batch Size: 35 x 14.6 x 7mm Material: aluminium alloy Colour: Silver Package Contents: 5 x USB Data Blocker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.